AIF-C01 Applications of Foundation Models Practice Question
A research team is using Amazon Bedrock to analyze scientific papers. They want the model to generate answers based only on papers published after 2023. Which approach should they use?
⚠ Common exam trap
AWS often tests the misconception that a system prompt or fine-tuning can reliably restrict a model's knowledge to a specific time period, when in fact only a retrieval-based approach with metadata filtering can enforce such temporal constraints.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Amazon Bedrock Knowledge Bases with a metadata filter to retrieve only papers published after 2023, and generate responses based on retrieved content.
Amazon Bedrock Knowledge Bases with a metadata filter allows you to restrict retrieval to only documents that match specific metadata criteria, such as publication year. By filtering the vector search to only include papers published after 2023, the model generates responses based solely on that retrieved content, ensuring it does not rely on pre-2023 data. This approach is the only one that guarantees the model's answers are grounded exclusively in the specified time range.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Fine-tune the model on a dataset of post-2023 papers and deploy it.
Why it's wrong here
Fine-tuning adds knowledge but does not remove pre-existing knowledge; the model may still fall back on older data.
- ✗
Set the maxTokens to a low value to force the model to rely on recent context.
Why it's wrong here
Token limits do not affect the model's internal knowledge; it can still use outdated information.
- ✗
Include a system prompt instructing the model to ignore data before 2023.
Why it's wrong here
System prompts are guidelines; models may still use pre-trained knowledge inadvertently.
- ✓
Use Amazon Bedrock Knowledge Bases with a metadata filter to retrieve only papers published after 2023, and generate responses based on retrieved content.
Why this is correct
Metadata filtering ensures only relevant recent documents are used, grounding the model in current data.
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Written by Johnson Ajibi, MSc IT Security
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